Calendar holder



FIG. 1 is a perspective view of a calendar holder showing our new design, the calendar pages depicted by means of broken lines being for illustrative purposes only and forming no part of the claimed design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is an elevational view of one side thereof the other side being a mirror image thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a calendar holder, as shown and described. 